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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
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Description
Holley EFI CAN Input/Output Module - Without Harness 554-166Adds Up To Eight Inputs and Outputs Features: This module is perfect for anyone wanting their Holley EFI ECU to control more functions or monitor more data channels1 HP and Terminator X EFI installations with only 4 inputs and 4 outputs can now add more functionality to their EFI system! 2 Quickly expand Dominator ECU? s Input Output control with 8 additional inputs and outputs3 The 554 165 kits contain a pre terminated CAN Harness, allowing you to
Adds Up To Eight Inputs and Outputs
Features:
- This module is perfect for anyone wanting their Holley EFI ECU to control more functions or monitor more data channels1
- HP and Terminator X EFI installations with only 4 inputs and 4 outputs can now add more functionality to their EFI system!2
- Quickly expand Dominator ECU?s Input / Output control with 8 additional inputs and outputs3
- The 554-165 kits contain a pre-terminated CAN Harness, allowing you to quickly install the Holley EFI CAN Module to any existing Holley EFI installation.4
- Inputs can be used for things such as:5
- -Switch 12v Toggle Switches - can be configured for external mechanical relays, or setup as digital switches via a Holley EFI dash6
- -Ground input for brake pedal switch7
- -5v analog inputs for sensors like fuel pressure, oil pressure, or nitrous bottle pressure8
- -Thermistor inputs for Coolant temperature sensors9
- Outputs can be used for things such as:10
- -Switch Low (Ground) ? For relay control or activation11
- -Switch Low PWM (Ground) ? PWM Fan control ? PWM Fuel Pump control - or other PWM- controlled devices.12
Specs:
| Brand | Holley EFI |
|---|---|
| Emission Code | 5 |
| Product Type | CAN Input Output Module |
| Warning | California Proposition 65 |
Application:
| Year | Make | Model | Submodel |
|---|---|---|---|
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.5 ★★★★★
Based on 399 reviews
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Product Reviews
★★★★★ 5
Nice
Size: 24x5.8, Color: Black
Easy install. Look nice and solid. Pay attention and be sure to install shelves with the pre drilled holes on the bottom of shelves.
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Reviewed in the United States on April 12, 2026
★★★★★ 5
Great small hanging shelf
These were a great addition to my DYI bathroom remodel. I needed that exact length and it fit perfect for my needs and I was able to install it myself. I’m a 53-year-old woman. I used the other one for a shelf for a candle as well. It holds my oral hygiene caddy well, keeping my sink counter clean.
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Reviewed in the United States on October 11, 2025
★★★★★ 5
Works Great and Easy to use
Size: 15x6.8, Color: Black
Great product works as described in ad and easy to use. Well built design and good quality. Easy to install. The price was a good value and fast shipped.
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Reviewed in the United States on October 9, 2025
★★★★★ 4
Not too sturdy
Size: 15x6.8, Color: Black
Not the sturdiest or highest of quality, but they look good. We attached them to our headboard as night tables and reinforced them with L braces from Home Depot and they work great
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Reviewed in the United States on November 19, 2025
★★★★★ 5
Easy to install
Size: 24x7.9, Color: Black
Easy to install and look great as floating shelves.
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Reviewed in the United States on April 4, 2026